for #443 Allow gem building with OSX xcode in non-standard paths

CHANGELOG

@@ -7,20 +7,32 @@
   We have interesting ideas of we what we do with Shoes that may be difficult
   to immplememt in Shoes 4. 
 
--------------- Shoes 3.3.9 ------------------------------
+-------------- Shoes 3.3.8 ------------------------------
 
 === New with 3.3.8
-  * Ruby 2.4.5(6) Gems 3.03
+  * Ruby 2.4.5, Gems 3.03
+  * Windows 64 bit. 
   * Updated versions of Gems (byebug, nokogiri, etc)
+  * User written layout class. 
 
 === Fixed with 3.3.8
   * osx: improved building of gems if user has homebrew. 
+    https://github.com/shoes/shoes3/issues/438
+    https://github.com/shoes/shoes3/issues/443 
+  * menu bug affected window resizing.
+    https://github.com/shoes/shoes3/issues/430
+  * some little unseen bugs
+  * A bad file or a folder name would crash font() call.
+    https://github.com/shoes/shoes3/issues/441
 
 === Developer Issues with 3.3.8
-  * Better cross building of gems (Windows from Linux)
+  * Better cross building of gems (Windows gems from Linux)
   * Ruby 2.4+ compatible. Tested with 2.5.5
   * Support for 64 bit on Windows 10
-  * Can build Shoes for native windows api. Not working. 
+  * Can build Shoes for native windows api. Not working well enough but 
+    it loads fast!
+  * better integration for gtk3.22 and beyond.
+  * better building on Windows for Windows. 
 
 -------------- Shoes 3.3.7 ------------------------------
 

lib/shoes/setup.rb

@@ -17,10 +17,12 @@ class << Gem::Ext::ExtConfBuilder
 	  alias_method :make__, :make
 	  def make(dest_path, results)
 	    raise unless File.exist?('Makefile')
+      xpath = `xcode-select -p`.chomp  # xcode doesn't have to be in Applications/Xcode
 	    mf = File.read('Makefile')
 	    mf = mf.gsub(/^V\ =\ 0/, "V = 1")
 	    mf = mf.gsub(/^ARCH_FLAG =/, "ARCH_FLAG = #{RbConfig::CONFIG['ARCH_FLAG']}")
 	    mf = mf.gsub(/MacOSX10\.\d+\.sdk/, 'MacOSX.sdk')
+      mf = mf.gsub("/Applications/Xcode.app/Contents/Developer", xpath)
 	    #mf = mf.gsub(/^INSTALL\s*=\s*.*$/, "INSTALL = $(RUBY) -run -e install -- -vp")
 	    #mf = mf.gsub(/^INSTALL_PROG\s*=\s*.*$/, "INSTALL_PROG = $(INSTALL) -m 0755")
 	    #mf = mf.gsub(/^INSTALL_DATA\s*=\s*.*$/, "INSTALL_DATA = $(INSTALL) -m 0644")